Hey guys, new here but lurked for a while reading articles and posts here and there. Now, I'm hoping I can get some specific help. I'm planning a pole barn build. Planning on a 24x24x10 garage. I'm thinking 2 roll up doors and a side entry door. Trying to do this on a budget but don't want to go too cheap. I live in South Louisisna so there is 0 snow load. My basic thinking is 4x6 posts. 3 on each side 8' apart. Use 4x4 posts for garage doors. Wrap the tops with 2x10 notched in for truss supports. My main questions are
1. Simplest way to frame outside walls? I don't plan on finishing inside. I was thinking 2x4's around the outside 3' centers.
2. Trusses? I want a low pitch roof with no eaves. Also how many? I'm reading most people go 2' OC but I see pictures of a lot with only 4-5 on a 24' building.
3. Purlins? Best to put gussets or to save, could I put 1x4's on top of trusses and go with just metal on top?
Sorry if I sound incompetent. I'm not a carpenter but do plan on tackling this myself. Thanks. Any help is appreciated.
1. Simplest way to frame outside walls? I don't plan on finishing inside. I was thinking 2x4's around the outside 3' centers.
2. Trusses? I want a low pitch roof with no eaves. Also how many? I'm reading most people go 2' OC but I see pictures of a lot with only 4-5 on a 24' building.
3. Purlins? Best to put gussets or to save, could I put 1x4's on top of trusses and go with just metal on top?
Sorry if I sound incompetent. I'm not a carpenter but do plan on tackling this myself. Thanks. Any help is appreciated.

good catch. Haha. Yea, I was simply doing 8x3 in my head and that's where I got three but you are correct. Same with trusses.thats the kind of stuff when I sit down and figure everything I'll catch. Thanks